Dekolink Wireless MW-CBDA-SMR-800-900-1W80, Installation And Operating Instructions Manual

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Dekolink Wireless Ltd.;16 Bazel St.Qiryat-Arieh Petah-Tikva Israel, 49510
Tel- 972-3-9180-180; Fax-972-3-
190 - 9180 ;
Email-marketing@dekolink.com
Installation Steps
1. Install all antennas and connect them to the CBDA inputs.
2. Open the access windows at the sides of the CBDA so that the variable attenuator is
reached and the LED is visible.
Turn the AGC On. This AGC limits the output power of the CBDA. The AGC on the Downlink
path guarantees constant downlink power when and if the Donor power changes.
Warning: T
he AGC switch must be always ON in order to limit the spurious signals.
3. Set downlink gain to minimum; uplink gain to minimum (by increasing the attenuation).
4. Increase the downlink channel gain (by decreasing the attenuation) till the LED turns from off
to on. This is the best gain setting giving highest usable power. Higher gain setting will
overdrive the AGC circuit.
5. The LED on the downlink power amplifier will illuminate if adequate donor (composite) power
has reached the CBDA. If the donor power is low the LED will not lit and the CBDA usable
power is not used efficiently.
6. The RF power alarm LED on the CBDA cover will lit if the downlink power is over 10 dB
below the composite power.
7. Set the uplink gain to the same as the downlink gain.
8. Check that the uplink LED on the CBDA monitor does not lit permanently. This LED would lit
permanently If the isolation between antennas is low (CBDA oscillations) or the CBDA is
faulty.
9. If the uplink LED light permanently then:
•
Disconnect one of the cables from the CBDA connectors and connect a load at the
connectors.
•
If the LED on this amplifier illuminates permanently then the CBDA is faulty
(oscillating) and needs replacing.
•
If the LEDs stops illuminating then the isolation between the donor and remote
antennas is low. Either improve the isolation (e.g. increase separation) or reduce
CBDA gain.
•
To reduce gain, reconnect the antenna cables. Reduce the gain at both uplink and
downlink path until this LED stops illuminating. Reduce the gain further by 10 dB.
This is the maximum usable gain.
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Web site-
www.dekolink.com
r
ev 1 11/04
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